← Search Journal of Finance Vol. 34 No. 1 1979 Investment Policy, Optimality, and the Mean-Variance Model David P. Baron DOI10.2307/2327154 Volume34 Issue1 Pages207 Sources semanticscholar openalex crossref Cite APA 7 MLA 9 Chicago (author–date) Harvard Elsevier Harvard (JFE, JBF…) The Accounting Review Academy of Management American Marketing Association INFORMS (Management Science) Copy citation Copied ✓